Cardiac Alarm
Heart Rate Monitor & Siren
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
A loud siren the moment your heart rate crosses your limits — on your watch and your Guards' phones. 7-day trial, $1.49/mo, billed annually at $17.99. Guards join free.
Cardiac Alarm is a specialized heart rate monitor built for people living with heart conditions, health-related phobias, adult children watching over aging parents, and anyone who wants one more layer of awareness for their heart.
Set a low and high heart rate threshold on your Apple Watch — Cardiac Alarm sounds a high-volume siren the instant your pulse crosses it. At the same moment, up to three people you choose — your Guards — are notified that you may need help, with a loud siren on their iPhones, wherever they are.
No dashboards. No useless statistics. Just a specialized heart rate monitor with a siren that goes off when something is wrong.
WHO IT'S FOR
• People living with a heart condition who want an extra layer of awareness
• Anyone with health anxiety, cardiophobia, or a fear tied to their heart rate
• Adult children keeping a quiet watch over an aging parent
• Anyone who simply wants one more safeguard, day or night
HOW IT WORKS
1. THRESHOLD — Choose the low (and optionally high) heart rate limits that should trigger an alarm, right on your Apple Watch.
2. ALARM — A high-volume siren sounds on your watch to alert anyone nearby, and your Guards are alerted on their iPhones at the same instant.
3. HELP — Anyone nearby, or your Guards, checks on you — and calls emergency services if needed.
GUARDS, EXPLAINED
Your Guards download Cardiac Alarm on their own iPhone — completely free — and enter a simple connection code you send them. Before a Guard is confirmed, they should receive a test alert they have to dismiss, so you both know the connection actually works. Do this test once a month; Cardiac Alarm will remind you.
BUILT FOR THE MOMENT IT MATTERS
Cardiac Alarm is approved for Apple's Critical Alerts, so your alarm can sound even through Silent Mode, Do Not Disturb, or Focus.
PRICING
• 7-day free trial
• $1.49/month, billed annually at $17.99 (best value)
• Or $2.99/month, billed monthly, if you'd rather not commit annually
• Completely free for your Guards — always
Cardiac Alarm is not a medical device and does not diagnose, treat, or replace medical care. If you have a heart condition, set your thresholds in consultation with your cardiologist.
Terms of Use: https://sites.google.com/view/cardiac-alarm-terms/home
Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Our biggest update yet.
• Your own thresholds — set the low and high heart rate limits that trigger the siren, right on your Apple Watch.
• Guards — invite up to three people. Their iPhones sound a loud alarm the moment yours does. Free for them.
• Critical Alerts — the alarm sounds through Silent Mode, Do Not Disturb, and Focus.
• Monthly test — a test alert proves the connection to each Guard still works.
The developer, Damir Skoko, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Damir Skoko
- Size
- 23.6 MB
- Category
- Medical
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Cardiac Alarm Premium $2.99
- Cardiac Alarm Yearly $17.99
- Copyright
- © 2026 Damir Skoko